Method for lowering a multiple cast ingot during continuous casting using only web contact



K. FRENKEN ET AL 3,303,538 A MULTIPLE CAST INGOT DURING CONTINUOUS Feb. 14, 1967 M'ETf iOD FOR LOWERING CASTING USING ONLY WEB CONTACT 3 Sheets-Sheet 1 Filed April 11, 1963 Feb. 14, 1967 K. FRENKEN ET AL 3,303,538

METHOD FOR LOWERING A MULTIPLE CAST INGOT DURING CONTINUOUS CASTING USING ONLY WEB CONTACT Filed April ll, 1963 3 Sheets-Sheet 2 Inventors Klaus Frenken 81 Wilhelm Sfe/lmacher By their Attorneys 3,303,538 METHOD FOR LOWERING A MULTIPLE CAST INGOT DURING CONTINUOUS Feb. 14, 1967 FRENKEN ET AL CASTING USING ONLY WEB CONTACT 5 Sheets-Sheet 5 Filed April 11, 1963 S ar w e n nhr M C m SH remAH m r W C! 1 w HUB m United States Patent 3,303,538 METHOD FOR LOWERING A MULTIPLE CAST INGOT DURING CGNTINUQUS CASTING USING ONLY WEB CONTACT Klaus Frenken, Essen-Werden, and Wilhelm telimacher, Dusseldorr, Germany, assignors to Mannesmann Aktiengesellschaft, Dusseldorf, Germany, a German body corporate Filed Apr. 11, 1963, Ser. No. 272,283 Claims priority, application Germany, Apr. 17, 1962, M 52,524 1 Claim. (Cl. 22-2001) For lowering individual ingots in continuous casting plants, the lowering rolls are designed as cylindrical or profiled rolls, resting against the continuous casting. The casting must have solidified above the lowering rolls because squeeze cracks tend to form on castings pressed by the lowering rolls whilst their core is still liquid. In order to prevent internal cracks, the distance between the ingot mould and the lowering rolls must be so large that, with a given lowering speed, the crater point is above the lowering rolls. -It is also possible to reduce the lowering speed, in order to produce a sulficiently long solidification time. In addition, the castings are distorted by about 2 to 4 mm. by the contact pressure of the lowering rolls, and this has an unfavourable effect particularly with round castings which tend to become oval or unround.

These drawbacks also occur with conventional devices for pulling off multiple cast ingots, that is to say, ingots having preferably the same shape which are connected by webs and are cast in the same mold, and which are then separated after solidifying by means of known apparatus.

According to the invention, these drawbacks may be avoided in that the contact pressure is exerted only on the connecting webs between the individual ingots of the multiple casting.

The substantial advantage of the invention is that the arrangement of the transport rolls becomes independent of the position of the crater. These rolls may be located above the crater in the direction towards the ingot hold without incurring the risk of causing squeeze cracks in the casting, and reduce substantially the overall structural height of the plant.

Fatented Feb. 14, 1967 The accompanying drawing shows diagrammatically in FIGURES l to 3 an arrangement for carrying out the method according to the invention.

As shown in FIG. 1 (end view) and FIG. 2 (side elevation), the ladle 1 is located above the distributor 2. On the upper stage 3 of the continuous casting plant, there is provided an ingot mold 4, constructed for casting three continuous castings 5. The lowering rolls are shown at 6.

As may be seen more clearly from FIG. 3, the castings 5 form continuous castings and are interconnected by webs 7. The lowering rolls 6 have roll rings 8 which collaborate with the webs 7. The roll rings 8 are positively connected with the rolls 6 by pass springs 9. In order to allow the position of the roll rings 8 to be adapted to different sizes of castings or to different distances between the Webs, there are provided distance rings 10 and clamping rings 11. The clamping rings serve to transmit axial forces to the rolls 6. However, the connection between the roll rings '8 and the rolls 6 may also be effected by other known means.

What we claim is:

In a continuous casting a method for lowering and guiding a multiple cast casting of preferably round cross-section with individual ingots interconnected by webs that are thin in comparison with the cross-sectional area of said ingots, the improvement comprising, using a roll contact pressure only on said webs and solely for lowering and guiding said casting.

References Cited by the Examiner UNITED STATES PATENTS 2,183,010 12/1939 Coxe 22-575 2,975,493 3/1961 Morton et al. 22-572 3,130,457 4/1964 Bungeroth et al. 22-575 3,147,521 9/1964 Boeh-m 22-2001 3,189,957 6/1965 Luteijn 22-2001 3,191,251 6/ 1965 Olsson 22-2001 3,209,452 10/1965 Schneckenburger 22-2001 J. SPENCER OVERHOLSER, Primary Examiner.

R. D. BALDWIN, Assistant Examiner, 

